If you thought money in politics was limited, take a look at the big checks from donors being reported by Super PACs, joint fundraising committees, and Section 527 groups.

Year-End campaign finance reports of candidates and political committees are due today, and disclose financial activity for the last part of 2013. While there are limits on how much can be given directly to federal candidates and a political committees, the limits are higher when several committees set up a joint fundraising committee. For Super PACs, that do not give directly to candidates but make independent expenditures, there are no limits. For Section 527 groups, there are no limits.